Best available cop



E. T. CURRAN AUTO RADIATOR THEHMOMETEH MOUNTING Filed May 24, 1921 Sept. 4, 1923.

0 V, WNW/M, w y z citizen of the United States, r'esidin Patented Sept. 4, 1923.

UNITEDYTATES- PATENTIOFFICE.

EDWARD T.- CfiRRAN, OF DETROEIT, MICHIGAN v auro l'aaniaron rmnmomnrnn "moorrrme.

m litias ind ,ilai 124, 1921. Serial in). 472,142.

To all whomit may comm bile radiator cap, :and particularly in;

,tended for. employment ,in conjunction with .an-automobile thermometerfqfi the character illustrated in my pending; application; Serial :No. 456,916, filed -Maavch 30th,;192'l, in which app a n: wim ediz els) iss fif bling: correct'readings ofvwate r temperatures to be made ag pm ent nvent n s mped -1 1v d e edto-noveland improv means w ereby a thermometer-of this; character, may be as'sociatedawi h he. c v at fl leh ernsa ior am m i hfmagm r m e er l h method ;of such application to be practiced ;therewith. ":1

- There are many of; radiator capson the market and manyof thesetypes areprovided at their5centers -with1 holes ,forthe attachment of an automobile thermometer -As thermometers are; 1 0W associated with these caps, however,-;the;b u1h, ofathe thermometer is isubjected;either directly to the action of the steam in the top of the radiator or depends below the surface of the. water therein.

The attachment of the present invention is so constituted that when the thermometer is in position on the cap, the bulb thereof will be housed in a closed chamber and will be affected only by heat transmitted from the water to the bulb by virtue of the conductivity of the metal forming the radiator, its cap and parts of the thermometer mounting.

Features of the invention, other than those specified, will be apparent from the hereinafter detailed description and claims, when read in conjunction with the accompanying drawings.

The accompanying drawings illustrate one practical embodiment of the invention, but the construction therein shown is to be understood as illustrative, only, and not as defining the limits of the invention.

Figure 1 shows a thermomcter'associated with the radiator cap by means embodying the presentinvention, a portion of the cap being shown in section in the interest I of clearness: and,

Figure 2 illustrates in section the various parts entering into the construction, di's mantled with respect to one another. Referring to the drawings, 1 designates any conventional form of radiator cap,gbut

for the purpose'of illustration, I have shown a cap well known on the market as the Blackcap, although the invention is capable ofbeing associated with any'form of cap and is not restricted to the specific environment in which it is shown in the drawings.

The Black cap, as placed on the market, embodies ametal shell 2, which is provided exteriorly, with a covering or coating ofinsulatingzmaterial generally hakelite; or

rpbber,comp osition.l Certain of these caps are provided with a central hole tend a recess 5 .to enable a radiator thermometer to be attachedthereto, and when sot-conditioned; are ready to receive the thermometer attachimg means of the present invention without further modification.fllowevc fl'apy cap which is not provided with a central perforation or depression 5, may beada pted for association with,the presontinvention by perforating it ,at-the center, toprovide'a'n N i v i 1, 1", d. open ng The recess 5 may be formcd m such a capor may be; omitted, if dcsiredhas it; is unessential. to the ,proper, performance of the functions of the thermometer'onits means of attachment.

For the purpose of illustration, I have shown in the drawings a thermometer 6 of the character described and claimed in my pending application aforesaid. and. as this device is placed on the market. embodies a holder 7 provided with a reduced depending tubular stem R, 'lbn holder has a side opening 9 through which may be seen a tube 1.0 of the thermometer provided with a bulb ll housed within the tubular stem 9 of the holder.

in attaching the holder to the cap 1, I utilize an intoriorlv threaded nut 12 of exterior diameter adapting it to he passed through the hole 5 of the on p in the under side thereof. and of an interior diameter adapted to receive the threaded stem 8 of the holder 7. The interior of the nut is threaded, so that the threaded stem 8 may be screwed thereinto and said out is pro ded the invent howev r,

with an enlarged head .3 adapted to rest against the under side of the cup. In screw ing the parts together, for the purpose of tightly clamping the top wall of the (tap between the head 13 of the nut 12 and a. shoulder 14 formed at the base of the holder 7, the nut 12 may be operated by a screw driver brought into engagement with the slot 15 in the head of the out, or, if desired, the .head 13 of thennt may be made poly onal, so that a. wrench'iuay be employed for the tightening of the same.

In practice, 1 preferably associate-u lock nut 16 with the construetion, so that the may ,be precluded ,fi om working loose when subjeted to ibretiqn, I do not limit I to'. h inp qyn ot' qck t 6, a this .n may 1 em d i he fi dep ing f he spiri th inv nt nn An imlwrte t f tureo th pres nt nret n re de nut efii sfirt e W1 the 1 1 121 in posi io 'gnt-hje pir 's ur d gsther in the manner,de c1' bs ,,,t e lett end of the tubulnrstem ii'irill Qhe closed. or sealed. i v 4 n h -pr er ed embo i nt of he i yentionshowmthis is accbmplished b making the threaded hole in thenut bl nd',, e-,-., l at s ow r d- H WQW in he same result' n ey he aecomp s'he y Plu ng the 5 9? n 8, w th rnetalor plastic material, so as to completely enclosethe bulb 1i of'the thermometer and preclude it from being' infflgggged by vi poror steam within the 'radi- It will be apparent from the foregom; dc-

s eription that the attachment of the present invention is of uuusuallysimple construct men rying out of its functions. It is'inexpensive to mn fach a m e sflw e d' y the 'peditious manner.

with all, highly eflicient intne carcar owner to associate a thermometer with the cap on the car without the employment of mechanical skill and in a. simple and ex- The foregoing description sets forth the invention in its preferred form. It will be understood, however, that changes in mechanical details,-"siieh as the substitution of equivalents may he made without departing from the spirit of this invention.

Havinw thus fully described the invention, what I claim as new and desire to secure by Letters Patent -is: 7

1. thermometer mounting embodying an epertured radiator cap, a thermometer holder carrying a thermometer end' provided with a depending threaded tubular stem which the bulb of thethei'mometer is housed, and n iziteriorly threaded blind nut adapted to screw u on the stem 'of the holder end proridedwit Em e'nler e'd heed, threaded stem. of tlie' lidlder is adg te gto'bep ssedthrough an aperture in thedilemma afidxhe min serewed onto st r i demure h hbld rfirmly h gap end si ulta eously seal the lower end of the stem of theholder, so that'the bulb of the thermometer' w vill p01 within the associated radietor.

" 2. "A thermometer moufting" embodying radiator ap, gnd"a thern1ometer holde'i car-wings thermometer and proi ided ,ivith' e thre'alded stem, in combination he passed through an aperture in the rediator cap from the underside thereof and in whieli'nut thefthreoded stem of the -the rmometerjholder '5 adapted to be screwed for the'pu'rpose of firm'ly' mounting the holder on the e'a In testimony whereof I have signed the foregoing speeification. EDWARD T. commuwith an 'ihterioflyfthreaded nut' adopted to i 

